EP0672315A1 - Rotor groove. - Google Patents

Rotor groove.

Info

Publication number
EP0672315A1
EP0672315A1 EP94900622A EP94900622A EP0672315A1 EP 0672315 A1 EP0672315 A1 EP 0672315A1 EP 94900622 A EP94900622 A EP 94900622A EP 94900622 A EP94900622 A EP 94900622A EP 0672315 A1 EP0672315 A1 EP 0672315A1
Authority
EP
European Patent Office
Prior art keywords
groove
rotor
section
cross
ideally
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94900622A
Other languages
German (de)
French (fr)
Other versions
EP0672315B1 (en
Inventor
Josef Berger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Elin Motoren GmbH
Original Assignee
Elin Motoren
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Elin Motoren filed Critical Elin Motoren
Publication of EP0672315A1 publication Critical patent/EP0672315A1/en
Application granted granted Critical
Publication of EP0672315B1 publication Critical patent/EP0672315B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
    • H02K17/20—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors having deep-bar rotors

Definitions

  • the invention relates to a squirrel-cage squirrel-cage rotor which has closed grooves along the circumference of the rotor, in which aluminum rotor bars which fill the groove are arranged.
  • Asynchronous machines with short-circuit squirrel-cage rotors find because of their great advantages, e.g. low acquisition and operating costs, good adaptability to many different machines and low maintenance, widespread. They can be used wherever there are only low demands on the speed constancy and the turning adjustment range. In the start-up phase, no additional actuators are usually required.
  • the object of the invention is to create a squirrel-cage rotor with simple means, the conductor bars of which are fixed in their position so that no imbalance can occur even at very high speeds.
  • the object is achieved by the invention.
  • the squirrel-cage squirrel-cage rotor is characterized in that the slot cross-section is designed in such a way that the rotor bar is fixed in its position by means of lugs which protrude into the ideal slot cross-section and bulges which protrude from the ideal slot cross-section.
  • One embodiment of the invention consists in that the ideally conceived slot cross section is divided in the radial direction into at least two slot sections, and that the slot sections are shifted alternately in or against the direction of rotation of the rotor, the tooth width between two adjacent slots the total height of the groove is the same.
  • the advantage of this configuration is that both the groove cross section and the tooth width are fully preserved compared to the ideally intended groove shape.
  • FIG. 1 shows a groove cross section 4 according to the invention, in which the ideally thought groove cross section 3 is dash-dotted and the groove cross section 4 according to the invention is shown with a strong border.
  • the ideally conceived groove cross section 3 is divided in the radial direction into four groove sections 5, the groove sections 5 being alternately displaced in or against the direction of rotation of the rotor.
  • This groove shape certainly prevents the conductor rod from shifting both when cooling after the aluminum has been introduced into the groove and also in high speed ranges.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Induction Machinery (AREA)

Abstract

In the squirrel-cage rotor proposed, the theoretically ideal groove cross-section (3) is divided radially into four zones (5) which are displaced relative to each other alternatively in and against the direction of rotation of the rotor. This gives the groove cross-section (4) as proposed by the invention, the width of the tooth (2) between the individual grooves being the same with the groove (4) proposed by the invention as it is with the theoretically ideal groove (3). This groove shape reliably prevents the condutor rods from shifting either as they cool after the aluminium has been introduced into the grooves (1) or at high rotational speeds.

Description

Rotornut Rotor groove
Die Erfindung betrifft einen Kurzschlußkäfigläufer, welcher entlang des Umfanges des Läufers geschlossene Nuten auf¬ weist, in welchen Aluminiumläuferstäbe, welche die Nut aus¬ füllen, angeordnet sind.The invention relates to a squirrel-cage squirrel-cage rotor which has closed grooves along the circumference of the rotor, in which aluminum rotor bars which fill the groove are arranged.
Asynchronmaschinen mit Kurzschlußkäfigläufern finden wegen ihrer großen Vorzüge, wie z.B. niedrige Anschaffungs- und Betriebskosten, gute Anpassungsmöglichkeit an viele unter¬ schiedliche Arbeitsmaschinen und geringe Wartung, eine weite Verbreitung. Sie sind überall dort einsetzbar, wo nur geringe Anforderungen an die Drehzahlkonstanz und den Dreh- Stellbereich gestellt werden. In der Anlaufphase sind meist keine zusätzlichen Stellglieder erforderlich.Asynchronous machines with short-circuit squirrel-cage rotors find because of their great advantages, e.g. low acquisition and operating costs, good adaptability to many different machines and low maintenance, widespread. They can be used wherever there are only low demands on the speed constancy and the turning adjustment range. In the start-up phase, no additional actuators are usually required.
Bei Rotoren mit Aluminium-Druck-, oder Schleudergu߬ käfigläufern im Drehzahlbereich über 6000 Upm kommt es immer wieder vor, daß durch die Verlagerung von Leiter¬ stäben in ihrer Nut die Rotoren unwuchtig werden. Zu dieser Verlagerung der Leiterstäbe kommt es entweder schon beim Auskühlen des Aluminiums, bedingt durch die starke Schrump¬ fung, oder im Betrieb mit hohen Drehzahlen.With rotors with aluminum pressure or centrifugal cast cage rotors in the speed range above 6000 rpm, it happens again and again that the rotors become unbalanced due to the displacement of conductor bars in their groove. This displacement of the conductor bars occurs either when the aluminum cools down due to the strong shrinkage or during operation at high speeds.
Die Aufgabe der Erfindung besteht nun darin, mit einfachen Mitteln einen Kurzschlußkäfigläufer zu schaffen, dessen Leiterstäbe so in ihrer Lage fixiert sind, daß selbst bei sehr hohen Drehzahlen keine Unwucht auftreten kann.The object of the invention is to create a squirrel-cage rotor with simple means, the conductor bars of which are fixed in their position so that no imbalance can occur even at very high speeds.
Die Aufgabe wird durch die Erfindung gelöst. Der Kurzschlußkäfigläufer ist dadurch gekennzeichnet, daß der Nutquerschnitt, mittels Nasen, die in den ideal gedachten Nutquerschnitt hineinragen, und Ausbuchtungen, die aus dem ideal gedachten Nutquerschnitt herausragen, so ausgebildet ist, daß der Läuferstab in seiner Lage fixiert ist. Mit der Erfindung ist es erstmals möglich, eine Nutform für einen Kurzschlußkäfigläufer zu schaffen, welche den Läufer¬ stab in seiner Lage festhält und dadurch eine Unwucht mit Sicherheit verhindert.The object is achieved by the invention. The squirrel-cage squirrel-cage rotor is characterized in that the slot cross-section is designed in such a way that the rotor bar is fixed in its position by means of lugs which protrude into the ideal slot cross-section and bulges which protrude from the ideal slot cross-section. With the invention it is possible for the first time to create a groove shape for a squirrel-cage rotor which holds the rotor rod in place and thereby reliably prevents an imbalance.
Eine Ausgestaltung der Erfindung besteht darin, daß der ideal gedachte Nutquerschnitt in radialer Richtung in min¬ destens zwei Nutabschnitte geteilt ist, und daß die Nut- abschnitte abwechselnd in bzw. gegen die Rotationsrichtung des Läufers verschoben sind, wobei die Zahnbreite zwischen zwei benachbarten Nuten über die gesamte Höhe der Nut gleich ist. Der Vorteil bei dieser Ausgestaltung besteht darin, daß sowohl der Nutquerschnitt als auch die Zahn- breite gegenüber der ideal gedachten Nutform voll erhalten bleibt.One embodiment of the invention consists in that the ideally conceived slot cross section is divided in the radial direction into at least two slot sections, and that the slot sections are shifted alternately in or against the direction of rotation of the rotor, the tooth width between two adjacent slots the total height of the groove is the same. The advantage of this configuration is that both the groove cross section and the tooth width are fully preserved compared to the ideally intended groove shape.
Anhand eines Ausführungsbeispieles wird die Erfindung nun näher erläutert. In Fig. l ist ein erfindungsgemäßer Nut- querschnitt 4 ersichtlich, bei dem der ideal gedachte Nut¬ querschnitt 3 strich-punktiert und der erfindungsgemäße Nutquerschnitt 4 stark umrandet dargestellt ist. Der ideal gedachte Nutquerschnitt 3 ist in radialer Richtung in vier Nutabschnitte 5 geteilt, wobei die Nutabschnitte 5 abwech- selnd in bzw. gegen die Rotationsrichtung des Läufers ver¬ schoben sind. Dadurch ergibt sich der erfindungsgemäße Nut¬ querschnitt 4, wobei die Breite des Zahnes 2 zwischen den einzelnen erfindungsgemäßen Nuten 4, gegenüber der ideal gedachten Nut 3, unverändert ist. Diese Nutform verhindert mit Sicherheit ein Verlagern des Leiterstabes sowohl beim Abkühlen nach dem Einbringen des Aluminiums in die Nut als auch in hohen Drehzahlbereichen. The invention will now be explained in more detail using an exemplary embodiment. 1 shows a groove cross section 4 according to the invention, in which the ideally thought groove cross section 3 is dash-dotted and the groove cross section 4 according to the invention is shown with a strong border. The ideally conceived groove cross section 3 is divided in the radial direction into four groove sections 5, the groove sections 5 being alternately displaced in or against the direction of rotation of the rotor. This results in the groove cross section 4 according to the invention, the width of the tooth 2 between the individual grooves 4 according to the invention being unchanged compared to the ideally intended groove 3. This groove shape certainly prevents the conductor rod from shifting both when cooling after the aluminum has been introduced into the groove and also in high speed ranges.

Claims

PATENTANSPRÜCHE PATENT CLAIMS
1. Kurzschlußkäfigläufer, welcher entlang des Umfanges des Läufers geschlossene Nuten aufweist, in welchen1. Short-circuit squirrel-cage rotor, which has closed grooves along the circumference of the rotor, in which
Aluminiumläuferstäbe, welche die Nut ausfüllen, angeordnet sind, gekennzeichnet dadurch, daß der Nutquerschnitt (4) , mittels Nasen (7) , die in den ideal gedachten Nutquerschnitt (3) hineinragen, und Ausbuchtungen (8), die aus dem ideal gedachten Nut¬ querschnitt (3) herausragen, so ausgebildet ist, daß der Läuferstab in seiner Lage fixiert ist.Aluminum rotor bars, which fill the groove, are arranged, characterized in that the groove cross section (4), by means of lugs (7), which protrude into the ideally thought groove cross section (3), and bulges (8), which result from the ideally thought groove protrude cross section (3), is designed so that the rotor bar is fixed in its position.
2. Kurzschlußkafiglaufer nach Anspruch l, gekennzeichnet dadurch, daß der ideal gedachte Nutquerschnitt (3) in radialer Richtung in mindestens zwei Nutabschnitte (5) geteilt ist, und daß die Nutabschnitte (5) abwechselnd in bzw. gegen die Rotationsrichtung des Läufers verschoben sind, wobei die Zahnbreite (2) zwischen zwei benachbarten Nuten (1) über die gesamte Höhe der2. Short-circuit squirrel cage according to claim 1, characterized in that the ideally conceived groove cross section (3) is divided in the radial direction into at least two groove sections (5), and in that the groove sections (5) are shifted alternately in or against the direction of rotation of the rotor. the tooth width (2) between two adjacent grooves (1) over the entire height of the
Nut (1) gleich ist. Groove (1) is the same.
EP94900622A 1992-12-01 1993-12-01 Rotor groove Expired - Lifetime EP0672315B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0236892A AT402771B (en) 1992-12-01 1992-12-01 ROTORNUT
AT23689/92 1992-12-01
PCT/AT1993/000181 WO1994013054A1 (en) 1992-12-01 1993-12-01 Rotor groove

Publications (2)

Publication Number Publication Date
EP0672315A1 true EP0672315A1 (en) 1995-09-20
EP0672315B1 EP0672315B1 (en) 1997-01-29

Family

ID=3533074

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94900622A Expired - Lifetime EP0672315B1 (en) 1992-12-01 1993-12-01 Rotor groove

Country Status (6)

Country Link
US (1) US5637943A (en)
EP (1) EP0672315B1 (en)
AT (1) AT402771B (en)
DE (1) DE59305364D1 (en)
ES (1) ES2098903T3 (en)
WO (1) WO1994013054A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035301A (en) * 1964-04-23 1977-07-12 Tii Corporation System for pollution suppression
US4005015A (en) * 1975-06-05 1977-01-25 Boward Jr James F Aerating apparatus
AU515490B2 (en) * 1977-04-29 1981-04-09 Envirotech Corporation Process for clarifying liquids by flocculation
US4211733A (en) * 1978-12-26 1980-07-08 Chang Shih Chih Gas-liquid mixing process and apparatus
US6777847B1 (en) * 1998-06-26 2004-08-17 General Electric Company Rotor core utilizing laminations having slots with dual direction skew portions
US7049725B2 (en) * 2003-11-24 2006-05-23 Tm4 Inc. Dynamoelectric machine stator and method for mounting prewound coils thereunto
JP5664936B2 (en) * 2012-11-22 2015-02-04 株式会社安川電機 Rotating electric machine and rotor
DE102014210339A1 (en) * 2014-06-02 2015-12-03 Siemens Aktiengesellschaft Squirrel cage of an asynchronous machine
JP6502881B2 (en) * 2016-03-14 2019-04-17 本田技研工業株式会社 Stator core
DE102017003294A1 (en) 2017-03-25 2017-10-19 Daimler Ag Rotor for an electric motor
JP7419205B2 (en) * 2020-09-25 2024-01-22 株式会社日立産機システム Rotor, squirrel cage induction motor and drive system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2350012A (en) * 1942-05-13 1944-05-30 Singer Mfg Co Electrical rotor core
US3137800A (en) * 1960-12-19 1964-06-16 Gen Motors Corp Dynamoelectric machine rotor means
DE1190094B (en) * 1963-11-06 1965-04-01 Loher & Soehne G M B H Fixing of the bars in the cage runner of electrical machines
US3778652A (en) * 1972-08-08 1973-12-11 Carrier Corp Rotor structure with squirrel cage winding
US3832583A (en) * 1973-03-08 1974-08-27 Westinghouse Electric Corp Squirrel cage motor with improved rotor bar securing arrangement
JPS6028758A (en) * 1983-07-27 1985-02-13 Hitachi Ltd Rotary electric machine with permanent magnet
JPS6192143A (en) * 1984-10-08 1986-05-10 Matsushita Electric Ind Co Ltd Rotor of motor
US4782260A (en) * 1987-02-27 1988-11-01 General Electric Company Closed slot rotor construction
JPH01209940A (en) * 1988-02-16 1989-08-23 Matsushita Seiko Co Ltd Core for rotor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9413054A1 *

Also Published As

Publication number Publication date
ES2098903T3 (en) 1997-05-01
US5637943A (en) 1997-06-10
DE59305364D1 (en) 1997-03-13
ATA236892A (en) 1996-12-15
EP0672315B1 (en) 1997-01-29
WO1994013054A1 (en) 1994-06-09
AT402771B (en) 1997-08-25

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